\begin{tabular}{lcccc} \hline
 & (1) & (2) & (3) & (4) \\
VARIABLES & install\_percDS\_pop & install\_percDS\_pop & install\_percDS\_pop & install\_percDS\_pop \\ \hline
 &  &  &  &  \\
price &  & 0.170*** & 0.166*** &  \\
 &  & (0.0178) & (0.0165) &  \\
A\_t &  & 6.01e-06*** & 6.39e-06*** &  \\
 &  & (9.76e-07) & (9.23e-07) &  \\
kwh\_ben & -8.52e-08* & 2.27e-08 &  &  \\
 & (5.04e-08) & (9.16e-08) &  &  \\
cost & 2.86e-07 & 5.49e-07 & 4.22e-07 & 4.22e-07 \\
 & (4.02e-07) & (3.38e-07) & (3.08e-07) & (3.08e-07) \\
cost\_ben & -4.00e-07*** & -4.08e-07*** &  &  \\
 & (1.24e-07) & (1.57e-07) &  &  \\
unit\_ben & 1.24e-07 & 1.39e-07 &  &  \\
 & (1.44e-07) & (1.34e-07) &  &  \\
CollPerc\_t & -9.41e-05 & 0.000294 & 0.000337 &  \\
 & (0.00566) & (0.00584) & (0.00586) &  \\
Pol\_t & -0.000850 & 0.00106 & 0.000763 &  \\
 & (0.00719) & (0.00713) & (0.00709) &  \\
price\_ben & 1.80e-06*** &  &  &  \\
 & (8.95e-08) &  &  &  \\
skwh &  &  & 0.00611 &  \\
 &  &  & (0.00949) &  \\
scost &  &  & -0.00890*** &  \\
 &  &  & (0.00318) &  \\
sunit &  &  & 2.44e-06 &  \\
 &  &  & (2.69e-06) &  \\
price\_std &  &  &  & 0.00451*** \\
 &  &  &  & (0.000447) \\
A\_t\_std &  &  &  & 0.00433*** \\
 &  &  &  & (0.000627) \\
skwh\_std &  &  &  & 0.000287 \\
 &  &  &  & (0.000446) \\
scost\_std &  &  &  & -0.00168*** \\
 &  &  &  & (0.000598) \\
sunit\_std &  &  &  & 0.000312 \\
 &  &  &  & (0.000343) \\
CollPerc\_t\_std &  &  &  & 6.64e-05 \\
 &  &  &  & (0.00115) \\
Pol\_t\_std &  &  &  & 0.000119 \\
 &  &  &  & (0.00111) \\
Constant & -0.0171* & -0.0539*** & -0.0531*** & -0.0531*** \\
 & (0.00952) & (0.00784) & (0.00863) & (0.00863) \\
 &  &  &  &  \\
Observations & 51,328 & 51,328 & 51,328 & 51,328 \\
 R-squared & 0.012 & 0.012 & 0.012 & 0.012 \\ \hline
\multicolumn{5}{c}{ Robust standard errors in parentheses} \\
\multicolumn{5}{c}{ *** p$<$0.01, ** p$<$0.05, * p$<$0.1} \\
\end{tabular}
